We're hopefully hiking to the observatory next week, but I've been unable to find out if you can access the observatory at the top as a hiker and if so, what is the price not having taken the cable car.

https://en.wikipedia.org/wiki/Pic_du_Midi_de_Bigorre

I have sent multiple emails in (Google) French to the observatory/tourists office in the region, but unfortunately I have not yet received a reply.

Have any posters here hiked to the observatory?

Thanks in advance,
Mike